Wiper for cleaning the surfaces of engraved plates when printing therefrom.



No.-'794.213. PATENTED JULY 11, 1905. F. E. BLAISDELL. WIPER FOR CLEANING THE SURFACES 0F ENGRAVED PLATES WHEN PRINTING THEREPROM,

APPLICATION FILED JAN; 2, 1904.

fimww flew/aim" -14? M. '4'. E'sahmm 45M M pwJM/VW/W Jilmvzqy UNTTEE STATES Patented July 11, 1905.

PATENT OEETcE.

FREDERICK ELIJ AH BLAISDELL, OF HAMPSTEAD, ENGLAND, ASSIGNOR TO THE COMMERCIAL DIE PRESS SYNDICATE LIMITED, OF LONDON,

ENGLAND.

WIPER FOR CLEANING THE SURFACES 0F ENGRAVED PLATES WHEN PRINTING THEREFROM.

SPECIFICATION forming part of Letters Patent No. 794,213, dated July 11, 1905,

Application filed January 2, 1904. Serial No. 187,585.

To It wit/217? it m/t l concern:

Be it known that I, FREDERICK ELIJAH BLAISDELL, of Hampstead, in the county of M iddlesex, England, have invented certain new and useful Improvements in Wipers for Cleaning the Surfaces of Engraved Plates when Printing Therefrom; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a wiper for removing superfluous ink or color from the surfaces of engraved plates or dies when printing therefrom and provides a novel construction of wiper having a smooth surface impervious both to the inks or colors used in printing and to the solvents of such inks or colors.

In my former patents, No. 731,334, dated June 16, 1903, and No. 742,091, dated October 20, 1903, I have for the above-named purpose added to the art the use of a wiper consisting of a material which is naturally impervious to printing inks or colors and to the solvents of such inks or colors, and in the latter of the two said patents I have also mentioned the use of a wiper composed of an absorbent material, the imperviousness of which is obtained by soaking the said material in or coating it with shellac or other substance which is not soluble in the above-named inks, colors, or solvents.

According to my present invention instead of using a material which is naturally impervious to printing inks or colors and their solvents I employ a more or less absorbent fabric or other suitable flexible material, which is rendered impervious by being loaded with a substance which is not soluble either in the inks or colors used in printing or in the solvents thereof, this loading being eflected by either soaking the absorbent fabric or flexible material in or coating it with the said insoluble substance. By these means I obtain a wiper which is capable of being used over and over again and of being cleaned by means of scrapers and by solvents of the ink or color.

As an example of my invention I use Woven silk loaded with shellac, thus producing a wiper which possesses the necessary smoothness and imperviousness for the required purpose. Instead of silk I can employ leather or woven material other than silk-c. r linen and cotton-and instead of shellac I can employ copal. If desired, glycerin or other suitable softening agent can be added to any of these hard gums to render the finished wiper more flexible.

In the accompanying drawings, Which are to be taken as part of this specification and read therewith, Figure 1 is a section of a wiper composed of absorbent woven material 1, loaded with shellac, copal, or other agent 2, capable of rendering the material 1 impervious, as hereinbefore described; and Fig. 2 is a section of a wiper composed of a nonwoven absorbent flexible material 3, such as leather similarly loaded with shellac, copal, or other agent I, capable of rendering the said material impervious, as previously described.

It is to be understood that no distinction is herein drawn between inks and colors, the two terms being used as the equivalents of each other and both being referred to in the following claims as printing-inks.

I claim 1. A wiper consisting of an absorbent flexible material loaded with a substance which is impervious to printing-inks and to the solvents of such inks.

2. A Wiper consisting of an absorbent woven fabric loaded with a substance which is impervious to printing-inks and to the solvents of such inks.

3. A wiper consisting of an absorbent flexible material loaded with a substance which is impervious to printing-inks and to the solvents of such inks, and to which substance is added a softening agent such as glycerin.

4. A wiper consisting of an absorbent woven fabric loaded with a substance Which is impervious to printing-inks and to the solvents of such inks, and to which substance is added a softening agent such as glycerin.

In witness whereof I have hereunto set my hand in the presence of two Witnesses.

FREDERICK ELIJAH BLAISDELL.

Witnesses:

HENRY I-IART, WARWICK H. WILLIAMS. 

